Mark Joseph Gillespie (born 27 March 1992) is an English professional footballer who plays as a goalkeeper for Premier League club Newcastle United.

On 20 February 2010, Gillespie was named as a substitute for Carlisle's League One match against Swindon Town due to an injury suffered by Lenny Pidgeley.

On 8 May 2010, the final day of the 2009–10 season, Gillespie made his professional debut in a win against Norwich City at Carrow Road after coming on as a late substitute.

Gillespie therefore became the youngest keeper ever to represent Carlisle, at 18 years and 42 days, beating the previous record set by Tony Caig.

[5][6] Gillespie was praised by Tottenham Hotspur boss André Villas-Boas and veteran keeper Carlo Cudicini after Carlisle slipped to a 3–0 defeat in a League Cup tie on 26 September.

[20] On 3 July 2020, Newcastle United announced the signing of Gillespie on a three-year contract, returning to the club after twelve years.